And henby f



Mar. 13,1923.

. JOHNSON ET AL,-

FEEDER'FOR BALL MILLS.

3 SHEETS-SHEET HLED JULY 31.1920.

Mar. 13, 1923.

@lllllf/ 0. H. JOHNSON ET AL. FEEDER FOR BALL MI'LLS. FILED JULY 3.1, 1920.

3 SHEETSSHEET 2.

Mar. 13, 1923.

.0. H. JOHNSON ET AL.

FEEDER FOR BALL MILLS.

s SHEETSPSHEET 3- FILED JULY 3!, 1920.

Patented Mar. 13, 1923.

stares mans tartar cr tical) OSCAR H. JoHNsoN, 01? DENVER, cotoneno, AND HENRY r. WEBB, or sAL'rIiAKE CITY, UTAH, ASSIGNORS TO THE MINE & SHELTER COLORADO, A GOERPORATION OF COLORADO.

surrrv company, or DENVER,

resonance BALL MILLS.

Application filed. July 31, 1820. Serial No. 400,522.

To all 4.0 710m it may concern.

Be it known that we, OsoAR H. JoHNsoN and HENRY F. WEBB, citizensof the United States, residing respectively at the city and county of Denver, State of Colorado, and at Salt Lake City, in the county of Salt Lake and State of Utah, have invented certain new and useful, Improvements in Feeders for Ball Mills, of which the following is a specification.

Our invention relates to an improvement in feeders for ball mills.

The object of this invention is to provide a feeder of the reversible type in which several spiral scoops are disposed around a common center, the several scoops all being of similar form and both removable and interchangeable so that anyone may be re newed irrespective of the others thus oft times making an entirely new feeder unnecessary, thereby greatly prolonging the life and usefulness of the feeder.

With the foregoing objects in view this invention includes a plurality of spiral scoops leading to a common center, the several scoops independent, removable, reversible and interchangeable.

This invention also includes a plurality of spiral scoops both removable and inter changeable and constructed and adapted to complement each other in connection with a winged deflecting cone into which the several scoops lead.

This invention still further consists in a sectional feeder including a plurality of spiral scoops any one or more of which may be replaced in case of wear or accident thus restoring the usefulness and efficiency of the entire feeder by merely supplying the worn or broken part thereby greatly increasing the life and usefulness of the machine while decreasing the expense of maintenance.

In the accompanying drawings Figure 1, is a vertical longitudinal sec tion. I

Figure 2, is a transverse section on the line A-A of Figure 1.

Figure 3, is a detached view of one of the scoops.

Figure 4:, is a sectional view through the Winged deflecting cone.

Figure 5, is an end View of the latter. F lgure 6, 1s a view n front elevat on of one of the scoop flanges.

The present invention is of the three-scoop feeder type, that is to; say, includes three scoops 1, 2 and '3. These @three scoops are in all particulars alike and they are inthe general form of a spiral and each includes a back 4, and sides 5, as shown in Figure 3, and these scoops are assembled around a centrally located deflecting cone 6, as shown in Figure 1, and the back 4:, ofeach scoop forms the bottom for another scoop so that one scoop is a complement of another and the inner edges 7, of the sides of the scoops are fashioned as shown in Figure 3, and" fit the cylindrical outer surface of the deflecting cone and the back of the inner scoop.

There are two scoop flanges 8, as shown in Figures 2 and 6, which embrace the scoops I from opposite sides and registering holes 9 and 10, are formed in these flanges and the side walls of the scoops respectively to receive bolts 11, by which these parts are rigidly but removably bolted together.

Holes 12 and 13, are also formed in the flanges and the outer end of the deflecting cone respectively to receive bolts .14, which removably hold the deflecting cone in the center of the feeder as shown in Figure 2. Bolts 15, are employed to fasten the feeder to the ball mill.

Wearing rings 16, are interposed in the spaces between the deflecting cone and the hubs of the two scoop flanges 8, as clearly shown in Figure 2.

Each scoop is preferably offset slightly at the outer end as shown at 17, and the inside and outside feeder lips 18 and 19, are secured thereon by rivets or similar means 20, passing through registering holes in the two lips 18 and 19 and the offset end 17, of the scoop thus presenting a removable cutting edge composed of the two, namely, the inside and outside feeder lips and the inner face of the inside lip 18, by means of this offset 17, is flush with the inside of the back 4, of the scoop.

Thus it will be seen that this feeder is composed of reversible and interchangeable removable parts, the duplicated parts being alike thus making it a very simple matter to assemble the feeder or to remove or replace a part. At the same time the feeder is simple in construction and effectual in the performance of the work required of it.

In the use of the term reversible in this application, it is meant in the sense-only in its connection With the cone.

We claim,

1. A feeder for ball mills composed entirely of reversible parts including a plurality of scoops. a deflecting cone at the center of the feeder, and two similar interchangeable scoop fianges secured at opposite ends of the feeder. v

2. A feeder for ball mills composed entirely of reversible parts including a plurality of spiral scoops constituting and forming complements of one another and reversible means at the center of the feeder for deflecting the material caught by the scoops.

3. A feeder for ball'mills including a plurality of removable, spiral, bottomless scoops, the back of each scoop forming the bottom of the next scoop and means at the center of the feeder for deflecting the material caught by the scoop.

4. A feeder for ball mills including a plurality of interchangeable, spiral, bottomless scoops, the back of each scoop forming the bottom of the next scoop and a reversible, deflecting cone at the center of the feeder to which said scoops lead and into which they discharge.

In testimony whereof We aflix our signatures.

OSCAR H. JOHNSON. HENRY F. WEBB. 

